Invalid Token

Sorry for the delay in getting you a response. I'm not sure what's causing that issue, but we'll gladly help investigate. In general, it definitely sounds like a caching issue. The only time we've run into something similar was when the caching in Joomla is enabled.

I know you've done a lot of testing, but I'd like you to try a few more things and let me know how it goes. I know you mentioned you disabled caching in the Joomla cache area, but I can't believe that didn't have an effect. The reason for the 'Invalid Token' message is because a special hidden value on the page that is set by the SCLogin module is incorrect for the current user. The only time we've seen this is with certain combinations of Joomla caching that shows an old token instead of the correct, current one.

Can you:
1) In the Joomla Global Config area, disable caching entirely. Then, clear your browser cache.. otherwise, some of the 'old' cached values may still be present. Test that way and things should work fine as long as you test. Once you enable caching again, I'm assuming problems may happen.
2) When you enable caching, please try "Conservative" caching and not "Progressive". Progressive is lower on the list, so people think it's an improvement over Conservative, but it's actually a little worse for 99% of sites. Unless you have a news type site that's always getting new content (like by the minute), it's not worth it.
3) If "Conservative" causes problems, please then go to the SCLogin module. In "Advanced" set Caching to "Disabled". Then, clear your Joomla *and* browser caches again. Try testing everything again. Hopefully, that will get things going.

The only other question is whether you have the System - Cache plugin enabled. Definitely disable that plugin during the tests above so we can narrow down the underlying cache issue. Once we get through things above, we can help you re-enable the System - Cache plugin if you want to use that as well.

I hope that helps get you started and sorry again for missing this post earlier!

Thanks,
Alex

Glad to hear you found a solution that worked for you. We'll look into if there's anything different we should be doing with the caching in the SCLogin module. We know caching works on a large amount of sites, so I'm not sure what's different in your case. However, we have heard of this issue a couple of times in the past (which isn't much in the scheme of things).

Of course, should you find any other issues or need anything else, just let us know.

Thanks,
Alex